How to make a PNG file from an RGB file of ASCII Hex Colours made using xxd
Notes:
- -depth 8 means 8 bits per RGB value
- 1158 is sqrt(wc -l 24jan2016-try-ig-vancouver-2015-dominant-colours.txt)
convert -depth 8 -size 1158x1158 24jan2016-try-ig-vancouver-2015-dominant-colours.rgb 1158x1158-24jan2016-try-ig-vancouver-2015-dominant-colours.png